Tallyman,
A loading block may not be so easy. You will need enough clearance between holes to work on each cartridge without disturbing other.
For your loading block, try to get taper holes. If you use a conical mandrel to form the jacket, it will give a better support to paper wall while reloading operations. It don't bother if paper tear in chamber under pressure, in loadin block that's an other story!.
Individual armor facilitate manipulations, I think to coat upper part of cartridge with hot grease.
Unprimed .45 brass are really convenients.Due to inside taper of case wall. When you fill the jacket it tighten against wall without slippery while squeezing paper, pushing the bullet. So you can handle, rotate firmly the cartridge.
Don't know if a .380acp or shortened .38spe will fit so well for 36 caliber. I say a shortened 38spe, as a try with a .45Colt wasn't successfull, paper jacket wasn't enough supported!.
Warren,
You are right, .45 brass are regulated items. But I'm also a legal, "modern" caster/metallic reloader/shooter, owning .45ACP wheelgun and 1911. As filler I use couscous, semolina not far from cornstarch, I suppose.